CMAKE Nitro Adjustments

[mhocking2020]

This changeset makes a variety of adjustments to the Nitro CMAKE with the goal of allowing it to be built in a more flexible environment. Most of these changes are due to Nitro not handling partial installs well in its current state.
Changes:

• Made the C++ version be set only if it's the base level project. This way, a parent project can build Nitro with C++17
• Make TRE installation and a few other installations optional so they do not fail the install process if they are not targeted
• Added some TREs that were missing from the CMAKE
• Make a macro target that installs all the TREs